Quiz2 - BIO 392 DUE Tuesday, October 24, 2006 Name _ QUIZ...

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BIO 392 Name _____________________________________ DUE Tuesday, October 24, 2006 QUIZ #2 Directions: Answer all questions. Must be typed. Show your work. 1. To understand the genetic basis of locomotion in the diploid nematode (worm) Caenorhabditis elegans , recessive mutations were obtained, all making the worm ‘wiggle’ ineffectually instead of moving with its usual smooth gliding motion. The mutations presumably affect the nervous or muscle systems. Twelve homozygous mutants were intercrossed, and the F 1 hybrids were examined to see if they wiggled. The results were as follows: A plus sign means the F 1 hybrid was wild type (gliding) A ‘w’ sign means the hybrid wiggled. 1 2 3 4 5 6 7 8 9 1 0 1 1 1 2 1 W + + + W + + + + + + + 2 W + + + W + W + W + + 3 W W + + + + + + + + 4 W + + + + + + + + 5 W + + + + + + + 6 W + W + W + + 7 W + + + W W 8 W + W + + 9 W + + + 1 0 W + + 1 1 W W 1 2 W A. Explain what this experiment was designed to test. This determines whether 2 homologous chromosomes carry non allelic mutations or different genes that
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Quiz2 - BIO 392 DUE Tuesday, October 24, 2006 Name _ QUIZ...

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